Inspired by @Stiv's This new puzzle type needs a name series, what is the name of the puzzle below?
Start by solving the (quite tough) Nonogram, then apply some grid-deduction-deduction and discover its name!
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(Thanks for the opportunity to answer one of these myself!) This puzzle is a:
Both @jafe and @Rand'alThor have already solved the first-stage nonogram. The next thing to notice is that:
Each different colour represents a specific number. In particular, taking the colours in 'rainbow order' and starting with Red = 0, we also have Orange = 1, Yellow = 2 and Green = 3. What type of puzzle might a grid containing only values 0-3 be? Why, a slitherlink. The resulting grid can then be resolved according to the rules of slitherlink (a line forming one continuous loop; each numbered cell describes the number of edges of that cell which are part of the loop), like so:
To extract the puzzle's name, we then...
...see which letters in the original grid end up on the path:
If we start top-left and follow the loop clockwise, we read off the letters NONOLINK - a portmanteau of NONOGRAM and SLITHERLINK, the two puzzles that have been combined here...
Note that the OP has also left a little 'Easter egg' in the unused letters, which anagram to SLITHERGRAM, an alternative portmanteau choice for this puzzle's name...
Nonogram solution is as follows:
Now some letters
(S, N, A, M, I, K, R, H, I) are not bordering two different colours,
(L, R, N, O, E, O, N, T, G) are on colour borderlines.
Noticeably, that second set of letters
includes N, O, N, O, G, R, ... and E, L, T.
The first set looks like it might be
an anagram of some Japanese grid-deduction name, like, I don't know, Narshmiki or something.
Other types of puzzle that come to mind, looking at this:
ANAGRAM (from the letters formed); POLYOMINOES (the shapes of the coloured pieces in the grid); TETRIS (could those coloured pieces be falling down?)